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A268429 as a simple table

n a(n)
2 1
3 4
4 16
5 62
6 238
7 910
8 3475
9 13270
10 50707
11 193948
12 742659
13 2847126
14 10928009
15 41993692
16 161555008
17 622201838
18 2398811962
19 9257512318
20 35760612784
21 138263710226
22 535038428936
23 2072130742074
24 8031333322206
25 31151602276002
26 120915026597458
27 469648731423190
28 1825348333058230
29 7098811400187410
30 27623655321103718

[1,4,16,62,238,910,3475,13270,50707,193948,742659,
 2847126,10928009,41993692,161555008,622201838,
 2398811962,9257512318,35760612784,138263710226,
 535038428936,2072130742074,8031333322206,
 31151602276002,120915026597458,469648731423190,
 1825348333058230,7098811400187410,
 27623655321103718]

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Last modified November 19 11:09 EST 2019. Contains 329319 sequences. (Running on oeis4.)